Gun-type firing device using caseless projectile

ABSTRACT

A gun-type firing device using a caseless projectile is disclosed. The caseless projectile has a bullet head and an impact seat at two ends thereof and a groove adjacent to the impact seat. The gun-type firing device includes a gunstock, a gun bolt and a gun barrel. The gun bolt is located on one side of the gunstock. The gun bolt includes a cocking handle and an extractor. The cocking handle can perform a linear displacement movement along the extension direction of the gunstock. The extractor is located at one end of the cocking handle. The gun barrel is located on the gunstock and is adjacent to one end of the gun bolt. The gun barrel does not have rifling.

REFERENCE TO RELATED APPLICATIONS

The present application is based on, and claims priority from, Taiwan application number 110148028, filed Dec. 21, 2021, the disclosure of which is hereby incorporated by reference herein in its entirety.

FIELD OF THE INVENTION

The invention relates to a firing device for weapons and ammunition, and more specifically, to a gun-type firing device using a caseless projectile.

BACKGROUND OF THE INVENTION

The firing devices of weapons mainly use propellant or gunpowder as a fuel. After the propellant or gunpowder is ignited, a high-pressure gas is generated in the chamber to push the warhead or projectile out. This firing device has defects.

Conventional guns or firing devices have a complicated structure, and it is easy for maintenance. For example, the inside of a conventional gun barrel has a rifle (also known as Rifling), which is configured to allow a bullet to rotate along the longitudinal axis of the rifle when the bullet is fired, resulting in a gyroscopic effect to stabilize the trajectory, and then shoot at the target more accurately.

However, the groove of the rifling in the barrel will accumulate sand. As a result, the bullet may jam and the barrel may explode.

In addition, the magazine of a firearm has a small storage capacity, and the cartridge case occupies a lot of space of the magazine. Conventional bullets or shells have cases made of precious metals, which consume a large amount of precious metals and also cause a great economic burden.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a gun-type firing device using a caseless projectile, which does not have rifling in the gun barrel of the gun-type firing device.

Another object of the present invention is to provide a gun-type firing device using a caseless projectile, which can prevent the gas generated after explosion from backlashing to reduce the recoil force after the gun-type firing device fires the caseless projectile.

In order to achieve the above objects, the present invention provides a gun-type firing device using a caseless projectile. The caseless projectile has a bullet head and an impact seat at two ends thereof and a groove adjacent to the impact seat. The gun-type firing device comprises a gunstock, a gun bolt, and a gun barrel. The gun bolt is located on one side of the gunstock. The gun bolt includes a cocking handle and an extractor. The cocking handle is configured to perform a linear displacement movement along an extension direction of the gunstock. The extractor is located at one end of the cocking handle. The gun barrel is located on the gunstock and connected to one end of the gun bolt. The gun barrel does not have rifling. When the impact seat is against one side of the gun bolt and the extractor is engaged with the groove, the caseless projectile and the cocking handle perform the linear displacement movement for the caseless projectile to move out of the gun barrel.

In an embodiment, the gun barrel is an elongate hollow cylindrical barrel. The gun barrel includes a muzzle area, a barrel area and a chamber area that are arranged in sequence from front to back. The chamber area includes at least three protrusions. The protrusions are arranged equidistantly on an annular inner wall of one end of the chamber area and are adjacent to the barrel area. When the caseless projectile is pushed into the chamber area, the protrusions scribe an outer surface of the caseless projectile to form a plurality of scribe lines, and the protrusions secure the caseless projectile in the gun barrel.

Preferably, the protrusions have a height of 0.05 millimeters.

Preferably, the cocking handle includes at least one raised block, and the chamber area has at least one guide groove. The raised block is disposed on an outer surface of one end of the cocking handle and is adjacent to the gun barrel. The guide groove is located on the inner wall of the chamber area. When the end of the cocking handle is pushed into the chamber area, the raised block and the guide groove cooperate with each other so that the gun bolt locks and closes the chamber area to prevent the recoil force generated by firing the caseless projectile.

Preferably, the raised block has a first length, a first width, and a first height. The first length is 1 millimeter. The first width is 5 millimeters. The first height is 3 millimeters.

Preferably, the cocking handle further includes an airflow groove. The airflow groove surrounds the outer surface of the cocking handle and is adjacent to the raised block. When the impact seat is fired to ignite gunpowder in the caseless projectile, a gas after combustion flows back to the airflow groove to prevent the gunpowder gas flow from impacting backward.

Preferably, the airflow groove has a second width and a depth. Each of the second width and the depth is 2 millimeters.

Preferably, the gun-type firing device further comprises a retaining frame. The retaining frame is disposed on another side of the gunstock. The retaining frame is configured to stand on a flat surface, thereby increasing the stability of the gun-type firing device.

In an embodiment, the chamber area includes a raised member. The raised member is located on an inner wall of a reduced area of the chamber area. When the caseless projectile is loaded, the extractor is engaged with the groove and pushes the caseless projectile into the chamber area. After the extractor strikes the raised member, the extractor is disengaged from the groove, and the end of the cocking handle is against the impact seat. The caseless projectile is pushed into the chamber area by the cocking handle. When a firing pin of the gun bolt strikes the impact seat, the caseless projectile is shot out of the gun barrel from the muzzle area.

Preferably, the gun-type firing device further comprises a safety device located on one side face of the gunstock. When a safety lever of the safety device is in a first position, the safety device is in an off state so that the gun-type firing device can be fired. When the safety lever is in a second position, the gun bolt can be pulled for loading and unloading, but the gun-type firing device cannot be fired. When the safety lever is in a third position, the gun-type firing device cannot be fired and the gun bolt is locked and unable to be pulled.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the gun-type firing device using the caseless projectile of the present invention;

FIG. 2 is an exploded view of the gun-type firing device of the present invention;

FIG. 3 is an exploded view of the gun bolt of the gun-type firing device of the present invention;

FIG. 4 is a cross-sectional view of the gun bolt and the gun barrel of the gun-type firing device of the present invention;

FIG. 5 is a schematic cross-sectional view of the present invention, illustrating that the caseless projectile is pushed into the chamber area by the gun bolt;

FIG. 6 is a perspective view of another embodiment of the present invention; and

FIG. 7 is a perspective view of a further embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

Referring to FIGS. 1-3 , the present invention discloses a gun-type firing device using a caseless projectile 2. The caseless projectile 2 has a bullet head 21 and an impact seat 22 at two ends thereof and a groove 23 adjacent to the impact seat 22 (as shown in FIG. 2 ).

The bullet head 21 of the caseless projectile 2 is fixed to the projectile body. When the caseless projectile 2 is fired in the gun-type firing device 1, there is no need for the step of discharging the cartridge case.

Furthermore, the bottom of the impact seat 22 has a plurality of blade-shaped scribe lines. When fired, the scribe lines are transformed into a plurality of nozzle structures through the impact force, so that the high-pressure gas generated by igniting the gunpowder is ejected from the nozzle structures, providing a rotating movement of the caseless projectile, which further achieves the effect of accurate firing without rifling.

The gun-type firing device 1 comprises a gunstock 11, a gun bolt 12, and a gun barrel 13.

The gun bolt 12 is located on one side of the gunstock 11. In this preferred embodiment, the gunstock 11 is a buttstock, but not limited thereto. The gun bolt 12 includes a cocking handle 121 and an extractor 122. The cocking handle 121 is configured to perform a linear displacement movement 9 along an extension direction of the gunstock 11. The extractor 122 is located at one end of the cocking handle 121.

The gun barrel 13 is located on the gunstock 11 and is connected to one end of the gun bolt 12. The gun barrel 13 does not have rifling. That is to say, when the caseless projectile 2 is fired, the friction between the caseless projectile 2 and the rifling can be avoided. When the gun-type firing device 1 shoots the caseless projectile 2, the initial velocity is increased to achieve a longer range.

Please refer to FIG. 4 and FIG. 5 . The gun barrel 13 is an elongate hollow cylindrical barrel. The gun barrel 13 includes a muzzle area 131, a barrel area 132 and a chamber area 133 that are arranged in sequence from front to back. The chamber area 133 includes at least three protrusions 1331. Four protrusions are taken as an example in this embodiment. The protrusions 1331 are evenly distributed on the annular inner wall of one end of the chamber area 133 and are adjacent to the barrel area 132. The protrusions 1331 have a height H (as shown in FIG. 4 ). In this preferred embodiment, the height H is 0.05 millimeters, but not limited thereto. When the caseless projectile 2 is pushed into the gun barrel 13, the protrusions 1331 scribe the outer surface of the caseless projectile 2 to form a plurality of scribe lines 24, and the protrusions 1331 secure the caseless projectile 2 in the gun barrel 13.

That is to say, according to the collected sample of the caseless projectile 2 and the configuration of the scribe lines 24 on the caseless projectile 2, the type of bullets used can be identified after trajectory identification. In addition, according to the trajectory identification of the scribe lines 24, the angle and the shooting distance can be estimated, and the specific range and direction in which the attack is done in certain specific areas can be determined.

The cocking handle 121 includes at least one raised block 1211. The chamber area 133 has at least one guide groove 1332. The raised block 1211 is disposed on the side of the cocking handle 121 and is adjacent to one end of the cocking handle 121. The raised block 1211 has a first length L1, a first width W1, and a first height H1 (as shown in FIG. 3 ). In this preferred embodiment, the first length L1 is 1 millimeter, the first width W1 is 5 millimeters, and the first height H1 is 3 millimeters, but not limited thereto.

The guide groove 1332 is located on the inner wall of the chamber area 133 at the other end of the gun barrel 13. The guide groove 1332 corresponds in number to the raised block 1211. Four guide grooves are taken as an example in this embodiment. When the end of the cocking handle 121 is pushed into the chamber area 133, the raised block 1211 and the guide groove 1332 cooperate with each other. In a preferred embodiment, the guide groove 1332 is an L-shaped guide groove, but not limited thereto, so that the gun bolt 12 locks and closes the chamber area 133 at one end of the gun barrel 13 to prevent the recoil force generated by firing the caseless projectile 2.

The cocking handle 121 further includes an airflow groove 1212. The airflow groove 1212 surrounds the outer surface of the cocking handle 121 and is adjacent to the raised block 1211. In the preferred embodiment, the airflow groove 1212 has a second width W2 and a depth D (as shown in FIG. 4 ). Each of the second width W2 and the depth D is 2 millimeters, but not limited thereto.

When the impact seat 22 is fired to ignite the gunpowder in the caseless projectile 2, the gas after combustion flows back to the airflow groove 1212 to prevent the gunpowder gas flow from impacting backward.

In addition, the chamber area 133 further includes a raised member 1333. The raised member 1333 is located on the inner wall of a reduced area 1334 of the chamber area 133. When the caseless projectile 2 is loaded, the extractor 122 is engaged with the groove 22 and pushes the caseless projectile 2 into the chamber area 133. After the extractor 122 strikes the raised member 1333, the extractor 122 is disengaged from the groove 22, and the end of the cocking handle 121 is against the impact seat 22. The caseless projectile 2 is pushed into the chamber area 133 by the cocking handle 121. When a firing pin 123 of the gun bolt 12 strikes the impact seat 22, the caseless projectile 2 is shot out of the gun barrel 13 from the muzzle area 131.

When the impact seat 22 is against one side of the cocking handle 121 and the extractor 122 is engaged with the groove 23, the caseless projectile 2 and the cocking handle 121 perform the linear displacement movement 9 for the caseless projectile 2 to move out of the gun barrel 13.

Please refer to FIG. 6 . In addition, in another embodiment, the gun-type firing device 1 further includes a retaining frame 14. The retaining frame 14 is arranged on the other side of the gunstock 11. The retaining frame 14 is configured to stand on a flat surface, thereby increasing the stability of the gun-type firing device 1.

Please refer to FIG. 7 . In addition, in a further embodiment, the gun-type firing device 1 further includes a safety device 15. The safety device 15 is located on one side face of the gunstock 11, and the safety device 15 is connected to the gun bolt 12. When a safety lever 151 of the safety device 15 is in a first position 81, the safety device 15 is in an off state so that the gun-type firing device 1 can be fired.

When the safety lever 151 is in a second position 82, the gun bolt 12 can be pulled for loading and unloading, but the gun-type firing device 1 cannot be fired.

When the safety lever 151 is in a third position 83, the gun-type firing device 1 cannot be fired and the gun bolt 12 is locked and unable to be pulled.

In summary, the advantages of the present invention are described below.

1. The gun barrel of the gun-type firing device does not have rifling. Thus, when the caseless projectile is fired, the friction between the caseless projectile and the rifling can be avoided. When the caseless projectile is shot out of the muzzle, the initial velocity is increased to achieve a longer range.

2. Through the design of the airflow groove, when the gun-type firing device fires the careless projectile, it can prevent the backlash of the gas generated by firing the caseless projectile, thereby reducing the recoil force.

3. Through the design of the protrusions, when the caseless projectile is pushed into the gun barrel, the protrusions scribe the outer surface of the caseless projectile to form a plurality of scribe lines, and the protrusions secure the caseless projectile in the gun barrel.

Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims. 

What is claimed is:
 1. A gun-type firing device using a caseless projectile, the caseless projectile having a bullet head and an impact seat at two ends thereof and a groove adjacent to the impact seat, the gun-type firing device comprising: a gunstock; a gun bolt, located on one side of the gunstock, the gun bolt including: a cocking handle, configured to perform a linear displacement movement along an extension direction of the gunstock; and an extractor, located at one end of the cocking handle; and a gun barrel, located on the gunstock and connected to one end of the gun bolt, wherein the gun barrel does not have rifling; wherein when the impact seat is against one side of the gun bolt and the extractor is engaged with the groove, the caseless projectile and the cocking handle perform the linear displacement movement for the caseless projectile to move out of the gun barrel.
 2. The gun-type firing device of claim 1, wherein the gun barrel is an elongate hollow cylindrical barrel, the gun barrel includes a muzzle area, a barrel area and a chamber area that are arranged in sequence from front to back, the chamber area includes at least three protrusions, the protrusions are arranged equidistantly on an annular inner wall of one end of the chamber area and are adjacent to the barrel area, when the caseless projectile is pushed into the chamber area, the protrusions scribe an outer surface of the caseless projectile to form a plurality of scribe lines, and the protrusions secure the caseless projectile in the gun barrel.
 3. The gun-type firing device of claim 2, wherein the protrusions have a height of 0.05 millimeters.
 4. The gun-type firing device of claim 2, wherein the cocking handle includes at least one raised block, the chamber area has at least one guide groove, the raised block is disposed on one side of the cocking handle and is adjacent to the end of the cocking handle, the guide groove is located on the inner wall of the chamber area, when the end of the cocking handle is pushed into the chamber area, the raised block and the guide groove cooperate with each other so that the gun bolt locks and closes the chamber area.
 5. The gun-type firing device of claim 4, wherein the raised block has a first length, a first width and a first height, the first length is 1 millimeter, the first width is 5 millimeters, and the first height is 3 millimeters.
 6. The gun-type firing device of claim 4, wherein the cocking handle further includes an airflow groove, the airflow groove surrounds an outer surface of the cocking handle and is adjacent to the raised block, when the impact seat is fired to ignite gunpowder in the caseless projectile, a gas after combustion flows back to the airflow groove.
 7. The gun-type firing device of claim 6, wherein the airflow groove has a second width and a depth, and each of the second width and the depth is 2 millimeters.
 8. The gun-type firing device of claim 1, further comprising a retaining frame, the retaining frame being disposed on another side of the gunstock, the retaining frame being configured to stand on a flat surface.
 9. The gun-type firing device of claim 2, wherein the chamber area includes a raised member, the raised member is located on an inner wall of a reduced area of the chamber area, when the caseless projectile is loaded, the extractor is disengaged from the groove after the extractor strikes the raised member, and the caseless projectile is pushed into the chamber area by the cocking handle.
 10. The gun-type firing device of claim 9, further comprising a safety device located on one side face of the gunstock, wherein when a safety lever of the safety device is in a first position, the safety device is in an off state so that the gun-type firing device can be fired; when the safety lever is in a second position, the gun bolt can be pulled for loading and unloading, but the gun-type firing device cannot be fired; when the safety lever is in a third position, the gun-type firing device cannot be fired and the gun bolt is locked and unable to be pulled. 